kinyutaka t1_j9z90un wrote on February 25, 2023 at 5:38 PM

Reply to comment by r3dl3g in ELI5: Why isn't the Litre (L) considered a "non-SI" unit? by enby-millennial-613

To be more specific, the Liter is simply a special name for the cubic decimeter (1 tenth of a meter, cubed)

The Liter is defined by its relation to the Cubic Centimeter, which is equal to the milliliter.

TheRealStorey t1_ja5s637 wrote on February 27, 2023 at 1:23 AM

A Liter is the volume of 1kg of water at STP (Standard Temperature and Pressure)

kinyutaka t1_ja5w157 wrote on February 27, 2023 at 1:53 AM

That is also true.

A cm^3 of water is one gram.

TheRealStorey t1_ja5zb7s wrote on February 27, 2023 at 2:19 AM

It was made to be universally transferable, everyone has water, there is a standard meter stick in France and it was updated to the length traveled by some light so it's universally reproducible. SAme with a second, it's the vibrations of some atom, but the idea is anyone can perform the same experiment anywhere and have the same precise measurement.